Re: [Xen-devel] XENFEAT_writable_pagetables vs VMASST_TYPE_writable_pagetables

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 31 May 2006, at 16:24, Jacob Gorm Hansen wrote:

> (XEN) DOM66: (file=mm.c, line=1522) Bad type (saw f0000001 != exp
> 20200000) for mfn e41 (pfn 75a)
> (XEN) DOM66: (file=mm.c, line=428) Attempt to create linear p.t. with
> write perms
> (XEN) DOM66: (file=mm.c, line=868) Failure in alloc_l2_table: entry 32
> (XEN) DOM66: (file=mm.c, line=1567) Error while validating mfn e40
> (pfn 75b) for type 40000000: caf=80000003 taf=40000001
This doesn't look like the result of a pmd_clear() call. Looks like a 
L2 (pgd) is being allocated -- perhaps due to pinning or changing %cr3. 
It's failing because one of the L1 pages it references is writable by 
the guest (ie. the guest has a writable mapping of that L1 page 
somewhere).
 -- Keir



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel